Hi
I have research by far and found that my 3G shield couldn't connect I2C for some reason. So that I decided to use UART 2 . I have followed this thread UART2 for data transfer using NodeJS and use "systemctl stop serial-getty@ttyMFD2.service" on SSH to disable UART 2 to console and plug my 3G shield into UART 2 . But after that I can't SSH through wifi anymore(I need SSH to write Linux command because UART 2 port is now used to connect to 3g shield).
At first when I connect both cable and connect Edison to Wifi , It seems fine
When I disconnect the serial cable(device mode cable still connect) then the Edison doesn't connect to wifi and I can't SSH anymore
Best regards